Machine for wrapping coverings around articles



P. SPAGNOLI Sept. 18, 1951 MACHINE FOR WRAPPING A COVERING AROUND ANARTICLE 3 Sheets-Sheet 1 Filed NOV. 50, 1948 P. SPAGNOLI Sept. 18, 1951MACHINE FOP WRAPPING A COVERING AROUND AN ARTICLE 5 Sheens--Shee1'I 2Filed Nov, 50, 1948 INVENTOR. PAU S PAGN OLI BY mi@ Vmyy,

A 'r1-o RNEYS P. SPAGNOLI Sept. 18, 1951 MACHINE FOR WRAPPING A COVERINGAROUND AN ARTICLEv Filed NOV. 50, 1948 5. Sheets-Sheet 3 INVENTOR.

PAU l.- S PAG NOLI @www TORNEYS WLM/vm,

Patented Sept. 18, 195.1

MAUH'I'NE 'noa WRAPPINGCOVERINGS AROUND ARTICLES Paul Spagrrli, .SanFrancisco, Calif.

imputation Nvter so, 194s, serial No. 62,706

I 10 Claims.

The present -invention relates to improvements in 'a machine yforwrappingacovering aroundjan article. It consists 'of the combinations,constructions, and arrangement 'of' parts, l'as 'hereinafter 'describedand claimed. u

,In my 'United Vstates netteijs Y Patent no. l2,". "8`5,)4f1"7, granted'September 25, 1944, 1 disclose 'a mattress wrapping 'machine that willtake-a hat mattress, compress and roll the mattress a' cylindrical formwhilevjvvrapping paper therearound. Uniform wrapping pressure is appliedto the mattress by this patented Vmanhn'e throughout the 'entire4wrn'iping 'operation, and the rolled `mattress occupies far lessstorage space thanail'atmattress. Au object of the p esent inventionisto provide a machine for tightly wrapping covering about an article.Although this 4machine may befuti'- iized in conjuncuonwith the patentesmachine for roiiiiigfand wrapping a mattress, rdnotwish 'to be confinedto this particular use. Tliepresent machine is adapted for wrappingvarious iartic'le'sfsu'chras mattresses, b'o'X springs, pieces offurniture, etc., with the wrapping material 4or cov'- erihg drawntightly 'around the Wrappedarticl'e.

yOther objects kand advamtages will appear as the -specicationcontinues. The novel features willlbe set forth in the claims hereuntovappend-ed. For a better understanding of the invention, referenceAshould be had to the accompanying drawings, forming part of thisapplication, in which:

Figure 1 is a side elevation of my machine for wrapping a coveringaround an article; 'Figure 2 is an isometric view illustrating a pairoi' `U shaped bars engaging opposing faces of a mattress, the bars beingsupported by a driving head forming part of my machine;

`Figure V3 is an isometric View of fa clamp that I employ for holdingthe U shaped bars in engagement with the interposed mattress; l

f Figure '4 is an enlarged transverse sectional View taken along the vline IV-LIV of Figure 1,

illustrating `thestart ofthe wrapping operation; f

Figure 5 isa Vview similar to Figure 4, but showhe mattress completelywrapped and still supported bythe `U shaped bars; 1

Figure 6 is 'a View similar to Figure 5, but diS-' closes the wrappedmattress withdrawniroin the fshapedbars;

Figure '7 discloses aplurality of articles after they 4l'rai'ie 'beenwrapped with my machine in a benedire. Covering.:

` Figure 8 is an end elevation of a slightly modi'- fio 2 ed form of'mypr'esent machine, portions being broken away, and illustrating'it'inconjunc'- 'tion with my patented mattress-wrapping ma'- 'ehine abovementioned;

Figure 9 isa transverse sectional view showing the driving head andarticle-supporting 'bars employed in the modified form of machine andillustrating the 'start of a mattress-wrapping opera-- ton; and 5`Eigure 10 is a horizontal transverse sectional viewtaken `along theline ,X-X of Figure 9.

While I havev shown only the preferred forms oi my invention, it shouldbe understood that various changes, or modifications, may vbe made :iWithin the 'scope of'the' claims hereunto annexed without departing fromthe spirit thereof.

In 'carrying my invention into practical prof vide a base A having amain frame B secured thereto and rising therefrom. This main ra'rneincludes spaced-apart upright channels lil and "l i which areinterconnected by horizontallyldis'- 'posed 'angle irons i2 andplatforms i2". Braces i4 (see Figure S) extend betweenthe base A and thechannels ill and fii to'reinforce the main frame B. :An overhead 'beami5 is secured Lto the channels i and il so as to'project horizontallytherefrom (see Figure l). The free end of this beam is supported byvbraces I6, which are anchored to a ceiling I1, beam, or the like. Also,y,I prvide the 'rods lita anchored to the channel lil for supporting thefree end of this beam.

The ichannel i l has a driven shaft I8 journallefd therein, Which isaligned with a driving shaft I9. A A conventional clutch 2@ is adaptedfor connect'- ing lor disconnectig these shaft-s together, 'and yisactuated by a throw-lever 2i. Any suitable means may be employed for`driving the shaft i9. For this purpose have shown a sprocket `22 thatis connected by a chain 23 to a sprocket 24 on a speed-reduction unit25. The latter is operated bya motor `V26.

The 'driven shaft i8 has a rotatable head IC secured thereto soast turntherewith. Figure l discloses a brake' 2id that is designed to apply abraking action on the rotative head C whenever the throw lever 2lismoved to the left to disenga'ge the clutch. The'lever 2i occupies-`the position shown in Figure l when the clutch is engaged. This hea-dcarries a rigid LIL-shapedV lower 4bar D! and a swingable U-Shaped upperbar D2'. These bars project `from the head in parallel relationwiththeaxis of rotation ma of the head (axis of shaft i8). Bar DI is adaptedt o support an article E from the underside of the latter, while the barD2 is made to overlie the article to clamp the article upon the lowerbar DI. The rotatable head C is disposed on one end of the article E,and the bars DI and D2 are suiciently long to have their closed ends d1and d2, respectively, extend to the opposite end of the article (seeFigure 1) Referring to Figures 1, 2, 4 and 5, it will be noted that theU-shaped bar DI has arms 21 provided with reduced ends 21a, the latterbeing insertable through any one of a plurality of openings 28 formed inthe rotatable head C. Nuts 2119 (see Figure 1) secure these reduced endsto the head.

In Figures 1 and 2, I show the arms 29 of the U-shaped bar D2 as beinghinged by bolts 30 to clevises 3|. The latter have stub shafts 3Ia. (seeFigure l) that are adapted to extend through openings 32, provided inthe head C. Nuts 3Ib anchor the stub shafts 3 Ia in adjusted position onthe head.

It will be obvious from the foregoing structure that the U-shaped barsDI and D2 may be adjusted toward and away from the axis of rotation I8a.The adjustment of these bars will depend upon the thickness of theinterposed article E.

The bar D2 may be swung into raised position, as suggested by itsdot-dash line illustration in Figure 1, and its closed end d2 engagedwith a catch 33 lcarried by the overhead beam I5. When Y bolts foroverlying and clamping the article E in place.

An inverted bell-crank member indicated generally at F is pivoted at 34to the free end of the overhead beam I5 (see Figure l). This memberincludes a vertically-disposed support 35, which is moveable toward andaway from the closed ends al1 andV d2 of the bar DI and D2,respectively, when the member F is swung on its pivot (see Figure 1).The support 35 carries a bolt-like shaft 36, which is moveable intoalignment with the axis I8a, of the rotatable head C.

Referring to Figures 1 and 3, it will be noted that I provide a clamp 31that is supported on the shaft 36. This clamp is secured to a drivensprocket 38 on the shaft 36. The clamp 31 is provided with an extension31a. that underlies and supports the closed end d1 of the bar DI; and,also, with a hook 315 that is engageable over the closed end d2 of theupper bar D2. The bars DI and D2 parallel one another; and, also,parallel the axis of rotation I8a about which the article E rotatesduring the wrapping operation. It will be noted that the extension 31a,is longer than the hook 31h. This permits the extension 31a to be guidedinto a position underneath the closed end d1 of the lower bar DI so asto support the latter. Thereafter, the support is moved closer to themattress E, and the closed end d2 of the upper bar D2 is depressedslightly and the hook 31h is engaged over the closed end d2.

Rotary motion may be imparted to the clamp 31 by the sprocket 38 insynchrony with rotation of the head C. For this purpose, the drivenshaft I8 is connected through a sprocket-chain connection 4I so as todrive a pinion 42 meshing with a gear 43 on a horizontal shaft 44disposed under the beam I5. This shaft carries a pinion 45 at itsforward end that drives a gear 46 rotatably carried by the support 35,The gear 46 operates a sprocket 41, which is connected by a chain 48 tothe sprocket 38 previously mentioned. The gear 46, sprocket 41, chain48, sprocket 38 and clamp 31 swing with the bell-crank member F.

In order to operate the clutch 20 from the forward end of the machine(left side of Figure 1), I provide a clutch-control lever 49 that ispivotally mounted at 5I) to a standard 5| rising from the overhead beamI5 (see Figure 1) This control lever is connected by a link 52 to theupper end of the throw-lever 2I, the latter operating the clutch 26.

The bell-crank member F has its horizontal arm 53 attached by an eyelet54 to one end of a cable 55. The opposite end of this cable is attachedto a counterweight 56, the intermediate portion of the cable beingtrained over a pulley 51. The purpose of the counterweight is to assistin moving the bell-crank member F. The latter can be swung until thesupport 35 is substantially horizontal.

As previously expressed, I do not desire to be limited to any particulararticle to be wrapped. In Figures 1, 2, 4 and 5 I show the article E ascomprising a mattress, which may be of any size. This mattress isclamped between the lower bar DI and the upper bar D2 by the clamp 31 atthe start of the wrapping operation. Rotation of the head C and thesprocket 38 in unison will rotate the mattress around the axis ofrotation I 8a. It is during this rotation of the mattress that thewrapping is accomplished.

Figures 1 and 4 disclose wrapping paper G having its free end 58 clampedbetween the upper bar D2 and the upper surface of the mattress or otherarticle E. Upon turning the head C in the direction of the arrow 59,paper will be drawn from a roll (not shown) and wrapped tightly aroundthe article. Figure 5 discloses sections 60 of the paper as passingbeneath the arms 21 of the bar DI and sections 6I of the paper extendingover the arms 29 of the upper bar D2. After a desired number of layersof paper have been wrapped around the article E, the paper is cut andits cut end 62 is pasted by glue 63 against the adjacent underlyingportion of the paper in which the article has been wrapped.

Thereafter, the clamp 31 is disengaged from the closed ends d1 and d2 ofthe bars DI and D2, respectively, the support 35 is retracted assuggested by the dot-dash lines of the support in Figure 1. Next, thearticle E is pulled to the left in Figure 1, thus withdrawing thearticle and its wrapping or covering from the bars. The sides 64 of thepaper G extend beyond the ends of the mattress and may be folded toenclose the mattress.

Figure 7 illustrates a mattress EI and box springs E3 that have beenwrapped together in the paper G by using my machine. It will beunderstood that other articles may be wrapped in the manner set forth.

Referring to Figures 9 and 10, I disclose a slightly modified form ofthe rotatable head. which has been designated at CI. This head has thelower bar DI adjustably secured thereto in the same manner as shown inFigure l. However, the head CI has a radial slot 65 which takes theplace of the openings 32 in Figures 4 and 5.

The bar D3 is swingably secured by a bolt 66 to a clevis 61 (see Figure10). The latter has a stub shaft 68 thereon, which projects through theradial slot 65. This clevis is anchored in adjusted position on the headCI by a clamping nut 69. In this modification, the lower U-shaped bar DI`'and the clamp `:3l `remain the same as in the first embodiment;

Figure 8 discloses al mattressecompre'ssiilg .and wrapping machine,Y isdesignated general; ly at E. 'This machine has been killu-strated in myUnited States Letters Patent No. 2,385,477, granted September 25, 1944.It is shown in Fig'- ilre 8 er the present drawings as being used inoonj'fhdtion with the second embodiment of 'the current invention,although it lcould operate with the'lrst embodiment.

'The .mattress-compressing and wrapping machine H iileln'des arolllabollt frame 10 en w'hieh a mattreeS-slipporting plati'orll TI isflilC-ned at 12. .fThe front end of 'this platform is yieldiin'glysllppo'rted by springs 13 'that bear against l the frame 1o and theplatfcritl 'll with sdmcient foi'o for normally holding the rear end ofthe platform down lipoi member 14 Vaflid by 'th frame. v Tehsin Springs:75 are connected tothe lframejlu and platform 1l te inge the latter te:

' DI and D3. It will be llnderstood that the ea'd C I Vin, Figure 8 isrotated by the saine me anisnl as shown in Figure l. One end of amattress E2 has been clamped between the bars D'Lald D3 and the head clrotated sc as tc partially `iciltltls mattress inte` :spiral shape withthe mattress tightly compressed. The `front end 'of `the platform yieldsduring 'the rolling of the mattress.

ln order to `feed wrapping 4paper to the tn'attress E2 dining therolling operatien, I provide a roll cf paper Jl which is lcarried by anotched sup; port 1s. Tliepapcr 1 1 .is 'ted frcin'tlie roll d anddvcnles the platform 1|. The papepasses under aguil-.le .1 3 and over apaper cutter "19. Figure 9` shows the free end 'l'l Vof this paper asbeing clamped between 'the underneath Surface of 'the mattress Ezhandthe arlns g1 of the lowei "LF shaped bar DI. The cutter 19 isspacedthede;

aired distanee from ythe mattress-rolling head 'Cl lso thatuone or moreextra layers ofmpap'er" n be wrapped around lthe .mattress afte vit hasbeen completely rolled, y, I Thepaperiefstretehed over the platt "Il andthe mattres E2 is placed on the top of this The end `of mattress nearesttheI head Cl ie placed betwenthe bars DI Vand D3; also, Athe free' end11a of the paper is placed v o'iier the arms 21. Thereafter, the swinga'ble platform Fis lowered and the clamp 31 is engaged with the barsDI and D3 in the saine manner as previously described. V y y l when`tice mattress `nl and pallet Il are 'clamped imposition, the head Cl isrotatedfi the direction of the arrow 80. Duringv the ,rolling of themattress,l the 'frontend o f the platform TI urged downwardly by the'telling dp of the mate` trees against the tension of the springs 'Hand15. This will make a tight oll- The paper "l'lv is wrapped dliring therolling preess s as' to ilife between adjacent layers f f the mattressroll. The front end of the platform 'H swings downiidly duill therolling the mttles.

After'the mattress is completely rolled, it may b'e rotated .throughadditional turns t Wrap paper 'aiotlnd the' Oll. Thelllpoil; `'tt kliif(not shown) may be passed along a slot 19a irl the paper 'cutter 19 forcutting the paper. The cut end of the papers is glued te the cuterwrapping of the roll. The pressure exerted by the 'springpressedplatrerinlll is sufficient te c'ausetlle glue h to fseclire the entendof the paper to the 'adjacent .layer of paper.

It .should be noted that in bo'th `forms o'f the present invention', thehead C or C1 and the clamp 31.1 are Jrotated in unison. thus preventingany twisting bf the articleeengaging bars.

l. `In amachinfor Wrappinga covering around a'n article.; a main framehaving a head rotatably mounted thereon; a plurality of spaced-apartlower 'bars carried by the head and .projecting lat'- erally therefromto support an article the underside of the latter; 'at least one upperbar also 'carried by the head to overlie the article and arranged toclamp the article to the lower bars; the bars paralleling the axis oirotation ol the head `and 'revolving th'e article lfor a wrappingoperation when the head vis rotated; the vbars projecting at least tothe end 'of the article' opposite the rotatable head; the `barsembracing and 1-sstairling 'the `alticle along 'its entire length; asupport carried by the frame and being .movevh able toward and away fromthe said endv fof 'the' art'iele andi-having a shaft thereon moveableinto alignment with the axis of rotation Aol the head; 'this shaft being`supported in its operative position in alignment with said la'xis bysaid support and Trame; a 'clamp on the Vshaft 'securable l'to `the barsa't'fSai'd ll'ld of the article t hold the bars in parallel relationwith one another Yafter the 'article has been olarlpd between the bars;and 'Inean's for rotating the head to revolve the artiL 'lei thesilpport and clamps being moveable into an out-of-the-way position to tallow endwise withdrawal o`f the article when the lamp is dis; engagedfrom the bars.

2. In a machine for wrapping a 'covering ar'oiln'd an article: a mainframe having a head rotatably mounted thereon; 'a plurality oispaced-apart lower bars carried by 'the head and projecting laterallytherefrom to support an article from the underside of the latter; atleast one upper bar also carried by the head to ov'erlie the article andarranged to clamp the article to the lower bars; l"the bars-parallelingthe axis of rotationv of the head and revolving the article for aAwrapping op; eration when the head vis rotated; the bars proijecting atleast tothe 'end of the article opposite the rotatable head; the barsembracing and :sustaining the article along its entire lengthf a supiport carried by the frame and being moveable to= ward and away from saidend of the article and having a shaft thereon moveable into alignmentwith the axis 'of rotation of the head; this shaft bi Supboted in itsOperative position in align# merit with said axis by Said Support andframe; a clamp on the 'shaft securable to the bars at said end of the'a-'Iticle t0 hold the bars in parallel' relatlcn with elle another afterthe article has been clamped between the bars; and driving means forrotating the clamp to turn the barsv` at said end cf the article aboutthe axis of rota; tion in synhrony with rotation of the head, thesupport and clamps being moveable into ail-out'-n ofeth'e-way positionto allow endwise withdrawal of the article when the clamp is disengagedfrom the bars. I l

3. In a machine for wrapping a covering-around an article; a main framehaving 'a head rotatably mounted thereon; a plurality of spaced-apartbars carried by the head and projecting laterally therefrom in parallelrelation with the axis of rotation of the head; the bars being made forclamping upon an articlefto support the latter andV revolve the articlefor a Wrapping operation when the-head -is rotated; the bars projectingat least to the end of the article opposite the rotating head; the barsembracing' and sustaining the article .along its entire length; theframe Aincluding a beam; a support swingably secured to the beam andbeing moveable toward and away'from said end of the article and having ashaft thereon moveable into alignment with the axis of rotation of thehead; a clamp on the shaft securable to the bars at said end of thearticle to hold the bars in parallel relation with one another after thearticle has been clamped between the bars; andmeans for rotating thehead; the support and clamps being moveable into an out-of-the-wayposition to allow endwise withdrawal of the article when the clamp isdisengaged from'the bars.

4. In a machine for wrapping a covering around an article; al main framehaving a head Arotatably mounted thereon; upper and lower bars 4carriedby the head and projecting laterally therefrom in parallel relation withthe axis of rotation of the head; the bars being made for clamping uponan article to support the latter and revolve the article for a wrappingoperation when the head is rotated; the bars projecting at least to theend of the .articlev opposite the-rotating head; the bars embracing andsustaining the article along its entire length; the frame including abeam; a support swingably securedl to the beam and being moveable towardand away from the said end of the article and having a shaft thereonmoveable into alignment with the axis of rotation of the head; a clampon the-shaft securable to the bars at said end of the -article to holdthe bars-in parallel relationjwith'one another after the article hasbeen clampedbetween thebars; means for rotating the head; and drivingmeans for rotating the clamp to turn the bars at said end of` thearticle about the axis of rotation in synchrony with rotation of thehead; the support and clamps being moveable into an out-of-thewayposition to allow endwise withdrawalof the article when the clamp isdisengaged from the bars.

5. In a machine for wrapping a covering around aniarticle; a main framehaving a head rotatably mounted thereon; upper and lower bars carried bythe head and projecting laterally therefrom in parallel relation withthe axis of rotation of the head; the bars being made for clamping uponan article to support the latter and revolve the article for a wrappingoperation when the head is rotated; the bars projecting at least to theendl of the article opposite the rotating head; tho bars embracing andsustaining the article along its entire length; the frame including abeam; a support swingably secured to the ,beam and being moveable towardand'away from the said end of the article and having a shaft thereonmoveable into alignment with the axis of rotation of the head; a clampon the shaft securable to the bars at said end of the article to holdthe bars in parallel relation with one another after the article hasbeen clamped between the bars; means for rotating the head; and drivingmeans for rotating the clamp to turn the bars at said end of the articleabout the axis of ro. tation in synchrony withrotation of the head; theAsupport and clamp being moveable into an out-of-the-way position toallow endwise withdrawal of tha article when the clamp is disengagedfromthe bars; said driving means including means automatically disengageableto discontinue driving of the clamp when the support is swung away fromsaid end of the article.

6. In a machine for Wrapping a covering around an article; a main framehaving a head rotatably mounted thereon; a plurality of spaced-apartlower bars carried by the head and projecting laterally therefrom tosupport an article from the underside of the latter; at least one upperbar also carried by the head to overlie the article and arranged toclamp the article to the lower bars; the bars paralleling the axis ofrotation of the head and revolving the article for a wrapping operationwhen the head is rotated; the bars projectingr at least to the end ofthearticle opposite the rotatable head; the bars embracing andsustaining'the article along its entire length; a support carried by theframe and being moveable toward and away from the said end of thearticle and having a shaft thereon moveable into align'- ment with theaxis of rotation of the head; this shaft Abeing supported in itsoperative position in alignment` with said 'axis by said support andframe; a clamp -on the shaft securable tothe bars at said end of thearticle to hold the bars in parallel relation with one another after thearticle has'been clamped between the bars; means for rotating the headto revolve the articlethe upper and lower bars being disposedequidistantly on opposite sides of said axis of rotation; and meansconnected tothe head for adjusting both the upperl and lower barsrelative to one another to vary the space therebetween, whilemaintaining the upper and lower bars equidistantly on opposite sides ofsaid axis of rotation.

'1.- In a machine for wrapping a covering around an article: a mainframehaving a head rotatably mounted thereon; a pair of U-shaped parallelbars arranged in spaced relation with one another to receive an articletherebetween; each barhaving spaced-apart arms embracing and sustainingthe article along its entire length; the ends of the bars being securedto the head; the arms of the bars paralleling the axis of rotation ofthe head; a support carried by the frame and being moveable toward andaway from the closed ends ofthe bars; a clamp rotatably mounted on thesupport and being securable to the closed ends of the bars to holdthe-bars in engagement with` the article; the clamp, when in operativeengagement with the bars, being disposed for rotation about an axiscoinciding with the axis of rotation of thehead; and means for rotatingthe head and clamp in synchrony about the axis of rotationfof the head.l

8'. In faY machine for wrapping a covering around an article; amainframe having a head rotatably mounted thereon; upper and lower U-shaped bars arranged in spaced relation with one another to receive anarticle therebetween; each bar having spaced-apart arms embracing andsustainingthe article along its entire length; the ends ofthe bars beingsecured to the head; the arms of the bars paralleling the axis ofrotation of the head; a support carried by the frame and being moveabletoward and away from the closed ends of the bars; ya clamp mounted onthe support. and beingy engageable with the closed ends of the bars tohold the bars in clamping relation with the article; the clamp, when inoperative engagement with the bars, being disposed for rotation about anaxis coinciding with the axis of rotation of the head; andv means forrotating the headand the clamp in synchrony about the axis of rotationof the head; the support and clamp being moveable into an out-of-the-wayposition to clear the closed ends of the bars and thus allow ythearticle to be withdrawn from between the bars at the closed endsthereof.

9. In a machine for wrapping a covering around an article; arotatably-mound head; upper and lower U-shaped bars arranged in spacedparallel relation with one another to receive an article therebetween;each bar having spaced-apart arms embracing and sustaining the articlealong its entire length; the ends of the bars being secured to the head;the upper bar having hinges therein arranged for swinging of that bartoward and away from the lower bar; the arms of the bar paralleling theaxis of rotation of the head, with the bars disposed on opposite sidesof said axis; a support moveable toward and away from the closed ends ofthe bars; a clamp rotatably carried by the support for turning aroundsaid axis when the support is moved into a position adjacent to theclosed ends of the bars; the clamp having an extension thereon moveableunder the closed end of the lower bar to support that end, and a hookengageable over the closed end of the upper bar to retain that bar downagainst the article; the extension being longer than the hook, wherebythe extension will provide a support for the lower bar while the hook isbeing engaged with or disengaged from the upper bar.

10. In a machine for wrapping a covering around an article; arotatably-mounted head; upper and lower U-shaped bars arranged in lo'spaced parallel relation with one another to receive an articletherebetween; each bar having spaced-apart arms embracing and sustainingthe article along its entire length; the ends ofthe bars being securedto the head; the upper bar having hinges therein arranged for swingingof that bar toward and away from the lower bar; the arms of the barparalleling the axis of rotation of the head, with the bars disposed onopposite sides of said axis; a support moveable toward and away from theclosed ends of the bars; a clamp rotatably carried by the support forturning around said axis when the support is moved into a positionadjacent to the closed ends of the bars; the clamp having an extensionthereon moveable under the closed end of the lower bar to support thatend, and a hook engageable over the closed end of the upper bar toretain that bar down against the article.

PAUL SPAGNOLI.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 486,090 Crowell Nov. 15, 18922,385,477 Spagnoli Sept. 25, 1945

